Packing tool capable of displaying tension

ABSTRACT

A packing tool capable of displaying tension includes a body and a control device. The body includes a strap winding device. A handle and a ratchet gear are fitted on the strap winding device. The ratchet gear abuts against a first abutting member. The control device is connected to the handle and includes a processing unit. The processing unit is electrically connected to a detection unit and a display unit. The detection unit is used to detect the amount of deformation of the first abutting member and then calculate and output a tension value to the display unit, so that the user can pay attention to the tension value applied to a packing strap by the packing tool at any time, so as to achieve the purpose of fast packing.

FIELD OF THE INVENTION

The present invention relates to a packing tool, and more particularly to a packing tool capable of displaying tension.

BACKGROUND OF THE INVENTION

In general, a packing strap is used to pack goods for transportation by means of a packing tool. A conventional packing tool comprises a body. The body is provided with a strap cutting device, a strap winding device and a strap pressing device. The strap winding device is provided with a handle. One end of the packing strap is inserted into the strap pressing device, and the other end of the packing strap is inserted through the strap cutting device and wound around the strap winding device and gradually tightened by the handle. Finally, the unnecessary packing strap is cut by the strap cutting device to complete the packing operation.

However, during the process of tightening the packing strap by the handle, if the tension applied to the packing strap is too large, the packing strap will exert a reaction force to the strap winding device, making the handle stuck and unable to rotate. As a result, the packing tool suffers a lot of wear and tear and even malfunctions. Conversely, if the tension applied to the packing strap is insufficient, the strap winding device is unable to tighten the goods. At this time, it is required to cut the packing strap by using the strap cutting device, and then perform the packing operation again. Therefore, the packing tool cannot achieve the effect of fast packing. Accordingly, the inventor of the present invention has devoted himself based on his many years of practical experiences to solve these problems.

SUMMARY OF THE INVENTION

The primary object of the present invention is to provide a packing tool capable of displaying tension, which allows the user to pay attention to the tension value applied to a packing strap by the packing tool at any time, so as to achieve the purpose of fast packing.

In order to achieve the above object, a packing tool capable of displaying tension is provided. The packing tool comprises a body, a detection unit, and a display unit. The body includes a strap winding device. The detection unit is connected to the strap winding unit. The detection unit is configured to detect a tension value of the strap winding device. The display unit is electrically connected to the detection unit for displaying the tension value.

In the packing tool provided by the present invention, the detection unit is used to detect the applied force value of the strap winding device and then calculate and output a tension value to the display unit, so that the user can pay attention to the tension value applied to the packing strap by the packing tool at any time through the display unit, so as to achieve the purpose of fast packing.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a preferred embodiment of the present invention;

FIG. 2 is a partial exploded view of the preferred embodiment of the present invention;

FIG. 3 is a block diagram of the preferred embodiment of the present invention;

FIG. 4 is an exploded view of the preferred embodiment of the present invention;

FIG. 5 is a cross-sectional view of the preferred embodiment of the present invention;

FIG. 6 is a block diagram of the processing unit of the preferred embodiment of the present invention;

FIG. 7 is a schematic view of the use of the preferred embodiment of the present invention, showing the setting of the control device;

FIG. 8 is a schematic view of the use of the preferred embodiment of the present invention, showing that the first abutting member and the second abutting member are disengaged from the ratchet gear; and

FIG. 9 is a schematic view of the use of the preferred embodiment of the present invention, showing that the first abutting member and the second abutting member are engaged with the ratchet gear.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings.

FIG. 1 is a perspective view according to a preferred embodiment of the present invention. FIG. 2 is a partial exploded view according to the preferred embodiment of the present invention. FIG. 3 is a block diagram of the preferred embodiment of the present invention. The present invention discloses a packing tool 100 capable of displaying tension. The packing tool 100 comprises a body 10, a detection unit 20, a control device 30, a display unit 50, an input unit 60, a warning unit 70, a wireless communication unit 80, and a power supply unit 90.

FIG. 4 is an exploded view according to the preferred embodiment of the present invention. FIG. 5 is a cross-sectional view according to the preferred embodiment of the present invention. The body 10 includes a strap winding device 11, a strap cutting device 12, and a strap pressing device 13. The strap winding device 11 includes a winding mandrel 111. A handle 14 and a ratchet gear 15 are fitted on the winding mandrel 111. The ratchet gear 15 abuts against a first abutting member 16 and a second abutting member 17. The first abutting member 16 and the second abutting member 17 are detents. The first abutting member 16 is pivotally connected to the handle 14. An elastic member 16 is connected to the handle 14 and the first abutting member 16. The second abutting member 17 is pivotally connected to the body 10. Another elastic member 19 is connected to the body 10 and the second abutting member 17. The elastic members 18, 19 are elastic sheets. The strap cutting device 12 includes a blade mandrel 121. The blade mandrel 121 is sleeved with a blade 122. One side of the blade 122 is slightly semicircular.

The detection unit 20 is connected to the strap winding unit 11. The detection unit 20 is configured to detect an applied force value of the strap winding device 11. Further, the detection unit 20 may be a load cell. The detection unit 20 may be attached to, in contact with, or fixedly connected to the strap winding device 11, such as the handle 14 or the first abutting member 16. In this embodiment of the present invention, the detection unit 20 is a strain gauge. The detection unit 20 is attached to the first abutting member 16. The detection unit 20 can measure the amount of deformation according to the applied force. Thereby, during the packing process, when the first abutting member 16 is compressed and deformed, the detection unit 20 will detect the amount of deformation of the first abutting member 16 and obtain the applied force value after correction.

FIG. 6 is a block diagram of the processing unit according to the preferred embodiment of the present invention. The control device 30 has an outer casing 31. The outer casing 31 has a through hole 32 extending in an axial direction thereof. The handle 14 is inserted through the through hole 32. The control device 30 is fixed to the handle 14 with a plurality of screws. A circuit board 33 is provided in the outer casing 31. In addition, the control device 30 includes a processing unit 4. In this embodiment of the present invention, the processing unit 40 includes a calculation module 41, a following module 42, a conversion module 43, a peak module 44, and a warning module 45. The calculation module 41 is configured to receive a signal from the detection unit 20, and then calculate and output a tension value of the first abutting member 16. The conversion module 43 is configured to convert and output the unit of the tension value. The peak module 44 is configured to output a peak of the tension value. The warning module 45 can set a first warning value and a second warning value.

The display unit 50 is electrically connected to the processing unit 40 and is configured to receive a signal output from the processing unit 40, including a tension value, a warning value, a unit, and so on. The display unit 50 has a panel 51 that is disposed on the outer side of the outer casing 31 and located between the body 10 and the handle 14 at a relative position to an underside 141 of the handle 14. The panel 51 is an LCD panel. The panel 51 has a backlight display function to provide lighting in dark areas, so as to increase the convenience of use.

The input unit 60 is electrically connected to the processing unit 40. The input unit 60 includes a first button 61, a second button 62, and a third button 63. In this embodiment of the present invention, the first button 61 serves as a return-to-zero button and an on/off button. The second button 62 serves as a switching button for the following module 42 and the peak module 44. Pressing the third button 63 for a short time serves as a unit switching button. Pressing the third button 63 for a long time serves as a warning value setting member of the warning module 45. Then, using the second button 62 and the third button 63 selects the first warning value or the second warning value, and the first button 61 is pressed to enter the setting. The second button 62 and the third button 63 are used for adjustment, and then the first button 61 is pressed to complete the setting.

The warning unit 70 is electrically connected to the warning module 45. The warning unit 70 has a first light-emitting member 71 and a second light-emitting member 72. The first light-emitting member 71 and the second light-emitting member 72 are disposed on the outer side of the outer casing 31 and electrically connected to the circuit board 33, respectively. In this embodiment of the present invention, the first light-emitting member 71 is a green LED, and the second light-emitting member 72 is a red LED. When the tension value reaches the first warning value, the first light-emitting member 71 will light up; when the tension value reaches the second warning value, the second light-emitting member 72 will light up.

The wireless communication unit 80 is electrically connected to the processing unit 40. The wireless communication unit 80 is Bluetooth. The value detected by the detection unit 20 or the tension value corrected by the processing unit 40 are transmitted to a mobile device, such as a mobile phone, in real time, which allows the user to pay attention to the tension value applied to the packing strap by the packing tool 10 at any time. The wireless communication unit 80 is electrically connected to a third light-emitting member 81. The third light-emitting member 81 is an LED, and is disposed on the outer casing 31 and electrically connected to the circuit board 33. Thereby, it can be known whether the wireless communication unit 80 has been successfully communicated with the mobile device through the lighting of the third light-emitting member 81.

The power supply unit 90 is electrically connected to the processing unit 40. The power supply unit 90 includes a power storage member 91, a charging member 92, and a fourth light-emitting member 93. In this embodiment of the present invention, the power storage member 91 is a battery. The charging member 92 is a charging stand. The charging member 92 can be connected to a power source for the power storage member 91 to be charged. The fourth light-emitting member 93 is a red LED. The fourth light-emitting member 93 is disposed on the outer casing 31 and is electrically connected to the circuit board 33. When the power supply unit 90 is in a charging mode, the fourth light-emitting member 93 will light up.

FIG. 7 is a schematic view of the use of the preferred embodiment of the present invention, showing the setting of the control device. First, the control device 30 is turned on by pressing the first button 61. A peak hold mode and a real-time display mode can be switched by pressing the second button 62 for a short time. When the second button 62 is pressed for a long time, the user can set the desired average number of times. After the setting is completed, the first button 61 can be pressed to switch to the real-time display mode, so as to display the average value of a plurality of detected tension values. Next, pressing the third button 63 switches the unit and the setting of the warning values. The second button 62 and the third button 63 are used to adjust the first warning value and the second warning value, and finally return to the real-time display mode to complete the setting steps.

FIG. 8 and FIG. 9 are schematic views of the use of the preferred embodiment of the present invention. When in use, after a packing strap is used to pack an article, the strap pressing device 13 is used to press against the packing strap, and the packing strap is inserted through the winding mandrel 111. Next, the handle 14 is lifted up, and the first abutting member 16 is abutted against the ratchet gear 15 so as to drive the ratchet gear 15 to rotate the winding mandrel 111 and roll the packing strap. When the handle 14 is pulled back, the second abutting member 17 is abutted against the ratchet gear 15 and the first abutting member 16 is disengaged from the ratchet gear 15, so that the user can restore the angle of the applied force of the handle 14 and further tighten the strap.

When the packing strap is tightened to a certain degree, the tension of the packing strap will generate a reaction force on the strap winding device 11 to deform the first abutting member 16. At this time, the detection unit 20 will detect the amount of deformation of the first abutting member 16, and the processing unit 40 receives the signal from the detection unit 20 and then calculates and outputs the tension value to the display unit 50. The panel 51 is located at a relative position to the underside 141 of the handle 14, so a tension value will be displayed when the handle 14 is operated. The user can pay attention to the tension value applied to the packing strap by the packing tool 10 at any time through the panel 51 to cooperate with the following module 42. Alternatively, the peak of the tension value can be displayed through the peak module 44, and the unit of force can be changed by using the conversion module 43.

It is worth mentioning that the user can set the first warning value and the second warning value at any time through the input unit 60 and the warning module 45. The first warning value and the second warning value are the target values of tension. When the tension value reaches the first warning value, the first light-emitting member 71 will light up, that is, the set target value has been reached, and the strap cutting device 12 can be used to complete the packing operation. When the tension value reaches the second warning value, the second light-emitting member 72 will light up, that is, the set target value has been reached, and the strap winding device 11 should be stopped to avoid excessive tension. In this way, the user can learn whether the tension value applied to the packing strap by the packing tool 10 has reached or exceeded the target value, thereby judging the tension value of the packing strap quickly.

Although particular embodiments of the present invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the present invention. Accordingly, the present invention is not to be limited except as by the appended claims. 

What is claimed is:
 1. A packing tool capable of displaying tension, comprising: a body, including a strap winding device; a detection unit, connected to the strap winding unit, the detection unit being configured to detect a tension value of the strap winding device; a display unit, electrically connected to the detection unit for displaying the tension value.
 2. The packing tool as claimed in claim 1, further comprising a control device, the control device including a processing unit, the processing unit being electrically connected to the detection unit and the display unit, the processing unit including a calculation module, the calculation module being configured to receive a signal from the detection unit and output the tension value.
 3. The packing tool as claimed in claim 2, wherein the processing unit includes a following module, a conversion module and a peak module, the following module is able to output the present tension value, the conversion module is configured to convert and output a unit of the tension value, the peak module is configured to output a peak of the tension value, the packing tool further comprise an input unit, the input unit is electrically connected to the processing unit, the input unit includes a first button, a second button and a third button, the first button serves as a return-to-zero button and an on/off button, the second button serves as a switching button for the following module and the peak module, and the third button serves as a unit switching button.
 4. The packing tool as claimed in claim 2, wherein the processing unit includes a warning module, the warning module is configured to set a first warning value and a second warning value, the packing tool further comprises a warning unit, the warning unit is electrically connected to the processing unit, the warning unit has a first light-emitting member and a second light-emitting member, when the tension value reaches the first warning value, the first light-emitting member lights up, when the tension value reaches the second warning value, the second light-emitting member lights up.
 5. The packing tool as claimed in claim 4, further comprising an input unit, the input unit being electrically connected to the processing unit, the input unit including a first button, a second button and a third button, the third button serving as a warning value setting member of the warning module, the second button and the third button serving as selection buttons and value adjustment buttons of the first warning value or the second warning value, the first button serving as a setting button.
 6. The packing tool as claimed in claim 1, further comprising a wireless communication unit, the wireless communication unit being electrically connected to the processing unit, the wireless communication unit having a third light-emitting member, wherein when the wireless communication unit is communicatively connected, the third light-emitting member lights up.
 7. The packing tool as claimed in claim 1, further comprising a power supply unit, the power supply unit being electrically connected to the processing unit, the power supply unit including a power storage member, a charging member and a fourth light-emitting member, the charging member being configured for the power storage member to be charged, wherein when the power supply unit is in a charging mode, the fourth light-emitting member lights up.
 8. The packing tool as claimed in claim 1, wherein the strap winding device includes a winding mandrel, the winding mandrel is sleeved with a handle and a ratchet gear, the ratchet gear abuts against a first abutting member, the detection unit is attached to the first abutting member, and the detection unit is a strain gauge.
 9. The packing tool as claimed in claim 2, wherein the control device has an outer casing, the outer casing has a through hole extending in an axial direction thereof, the handle is inserted through and fixed to the through hole, the display unit has a panel, and the panel is disposed on an outer side of the outer casing and located at a relative position to an underside of the handle. 